AeroElectric-List Digest Archive

Thu 07/24/14


Total Messages Posted: 7



Today's Message Index:
----------------------
 
     1. 07:31 AM - Re: one-wire alternators- the subject that just won't die (Robert L. Nuckolls, III)
     2. 07:42 AM -  (Todd Bristol)
     3. 08:41 AM - Re: Unsubscribe  (Jon Molek)
     4. 09:06 AM - Re: Re: Unsubscribe  (Tim Andres)
     5. 09:39 AM - Re: Re: Unsubscribe  (Jon Molek)
     6. 10:55 AM - GNS430 Microphone/Sidetone Problem (Jared Yates)
     7. 03:10 PM - Re: one-wire alternators- the subject that just won't die (Charlie England)
 
 
 


Message 1


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    Time: 07:31:08 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: one-wire alternators- the subject that just won't
    die At 02:58 PM 7/23/2014, you wrote: Hi Bob, Please forgive me, but I need a refresher on why one-wire (internally regulated) alternators are no longer recommended for a/c; even banned from 'the Book'. I've never 'banned' anything from the book. But in the interest of brevity and shortest path to demonstrated success at low risk levels, I have focused AeroElectric efforts on a limited range of ideas and products that embrace the best-we-know-how-to-do . . . Far too many over-excited people have morphed my recommendations into warnings: "DON'T DO THAT lest you fall out of the sky an die!" I have never worked on or read about an accident that had root cause in failure of electrical parts to perform as advertised . . . EVERY case I'm aware of had roots in human failings to understand limits imposed by poor craftsmanship or operation of those parts. I do remember (scratch that; know from experience) that if the B-lead contactor opens while the alternator is under load, there can be a 'load dump' (high voltage spike) issue that can kill the electronics (the regulator) in the alternator. Makes sense. Only on certain alternators that fall short of the- best-we-know-how-to-do. Consider this excerpt from the chapter 3 of the 'Connection http://tinyurl.com/nchenmr [] But if the only way the B-lead contactor is allowed to open is due to an overvoltage fault, does it matter? =C2 At that point, it's a given that the regulator is already toast, and the entire alternator will be swapped out to fix it. Given the very high reliability of modern automotive alternators, and that the only time the B-lead contactor would need to open under load is during a true OV fault event, what's the compelling reason to keep the 'not recommended' philosophy? Not a 'big deal' as you have deduced. The 'problem' is rooted in legacy cockpit protocols that do not prohibit turning off a loaded alternator. You can do it in any TC aircraft without risk of damage. You can do it in any aircraft fitted with an alternator of the quality cited in the narrative about MPA. But unlike the cookie-cutter conformity control offered by the TC aircraft world, we have no way to KNOW what quality of alternator was being offered by Van's . . . it seems that one or more of his customers experienced a untimely demise of his alternator by switching it on and off with the b-lead contactor. I've had a couple of different career paths involving running a soldering iron & modifying stuff (both consumer and industrial electronics maintenance), so I'm not 'afraid' to dig into an alternator to modify it for external regulation. But I'm of the 'if it ain't broke, don't fix it' school. By all means, dig in. Photograph every step. Show us what you found and how you dealt with it . . . you're not 'fixing' it, you're adapting it to higher design goals. I'd like to be educated on what I'm overlooking in terms of risk, failure modes (fire?), etc. If it's reasonable to bring the one-wire alternator (with contactor style OV protection)back into the mix, the next question will be about integrating a backup dynamo style alternator without spending close to half an Aviation Unit for the hardware. :-) Yeah . . . but. The same project economics are in play here as for the dummy-load conversation we had earlier this week. The $parts$ are cheap but the $time$ is significant. Further, there are $risks$ for not being aware of all the design subtleties. Not risks of life, limb and airplane . . . but of future $time$ expended to 'fix' something overlooked. You can purchase an ND cored reman for a very reasonable price. But check installation dimensions so that you can use a commonly available bracket. You may need to find a new pulley. Doing the 'mod' is straightforward and low risk. The PM alternator is a bit harder. You need either a pulley on the engine and brackets to hold the alternator . . . or the machining resources to craft a pad-friendly spline drive. I think the SD-8 is pretty attractively priced given the effort it would take to DIY. Bob . . .


    Message 2


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    Time: 07:42:00 AM PST US
    From: Todd Bristol <djtoddb@yahoo.com>
    Hello Out there....=0AWhat can I do to subscribe to the List / Group?=0A- =0ATodd Bristol=0AInteractive Entertainment DJs and Events,=0ACasino Partie s and Game Shows.=0AMesa, Arizona=0A480-755-4200=0Awww.djs4u.com=0Awww.game showsamerica.com=0Awww.condopenasco.com=0A=0A=0ASport Pilot...=0A=0A- - - - - - - - - -_|_-=0A-------- Todd ___ /===\___ Bristol=0A----- \__________(- .- )___________/ -=0A---------- (*)--- \___/--- (*)


    Message 3


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    Time: 08:41:31 AM PST US
    From: "Jon Molek" <acub@neo.rr.com>
    Subject: Re: Unsubscribe
    i wanted to unsubscribe to the email forms , (i'm getting to many to keep up with & then erase) ----- Original Message ----- From: Todd Bristol To: aeroelectric-list@matronics.com Sent: Thursday, July 24, 2014 10:40 AM Hello Out there.... What can I do to subscribe to the List / Group? Todd Bristol Interactive Entertainment DJs and Events, Casino Parties and Game Shows. Mesa, Arizona 480-755-4200 www.djs4u.com www.gameshowsamerica.com www.condopenasco.com Sport Pilot... _|_ Todd ___ /===\___ Bristol \__________( . )___________/ (*) \___/ (*)


    Message 4


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    Time: 09:06:44 AM PST US
    From: Tim Andres <tim2542@sbcglobal.net>
    Subject: Re: Unsubscribe
    Nobody can do this for you, log onto the Matronics site and adjust your set tings. The link is in every email.=0A=0ATim=0A=0A=0A=0AOn Thursday, July 24 , 2014 8:54 AM, Jon Molek <acub@neo.rr.com> wrote:=0A =0A=0A=0A =0Ai wanted to unsubscribe to the email forms =0A,=0A(i'm getting to many to keep up w ith- & =0Athen erase) =0A----- Original Message ----- =0A>From: Todd Bris tol =0A>To: aeroelectric-list@matronics.com =0A>Sent: Thursday, July 24, 20 14 10:40 AM=0A>=0A>=0A>Hello Out there....=0A>What can I do to subscribe to the List / Group?=0A>-=0A>Todd Bristol=0A>Interactive Entertainment DJ s and Events,=0A>Casino Parties and Game Shows.=0A>Mesa, Arizona=0A>480-755 -4200=0A>www.djs4u.com=0A>www.gameshowsamerica.com=0A>www.condopenasco.com =0A>=0A>=0A>=0A>Sport Pilot...=0A>=0A>=0A>- - - - - - - - - -_|_-=0A>-------- Todd ___ /===\___ Bristol =0A>----- \__________(- .- )___________/-=0A>---- ------ (*)--- \___/--- (*)=0A>=0A>-=0A>-=0A>hr ef="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matr onics.com/Navigator?AeroElectric-List=0Ahref="http://forums.matronics.com ">http://forums.matronics.com=0Ahref="http://www.matronics.com/contributi ==


    Message 5


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    Time: 09:39:12 AM PST US
    Subject: Re: Unsubscribe
    From: Jon Molek <acub@neo.rr.com>
    there's no place in it I can find it says to unsubscribe unless there's a difference site I'm not looking at,maybe you can send me th at site and I'll do it thank you John Sent from my iPad > On Jul 24, 2014, at 12:05 PM, Tim Andres <tim2542@sbcglobal.net> wrote: > > Nobody can do this for you, log onto the Matronics site and adjust your se ttings. The link is in every email. > Tim > > > On Thursday, July 24, 2014 8:54 AM, Jon Molek <acub@neo.rr.com> wrote: > > > i wanted to unsubscribe to the email forms , > (i'm getting to many to keep up with & then erase) > ----- Original Message ----- > From: Todd Bristol > To: aeroelectric-list@matronics.com > Sent: Thursday, July 24, 2014 10:40 AM > > Hello Out there.... > What can I do to subscribe to the List / Group? > > Todd Bristol > Interactive Entertainment DJs and Events, > Casino Parties and Game Shows. > Mesa, Arizona > 480-755-4200 > www.djs4u.com > www.gameshowsamerica.com > www.condopenasco.com > > Sport Pilot... > > _|_ > Todd ___ /===\___ Bristol > \__________( . )___________/ > (*) \___/ (*) > > > > > href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.m atronics.com/Navigator?AeroElectric-List > href="http://forums.matronics.com">http://forums.matronics.com > href="http://www.matronics.com/contribution">http://www.matronics.com/c > http://www.matronics.com/Navigattarget="_blank" href="http://forums.ma tronics.com/">http://forums.matro --> > 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3 D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >


    Message 6


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    Time: 10:55:04 AM PST US
    Subject: GNS430 Microphone/Sidetone Problem
    From: Jared Yates <email@jaredyates.com>
    Today when I started my flight, all seemed well. Shortly after takeoff I tried to make a radio call, but when I held the mic key, instead of getting the usual sidetone, I got a series of clicks. I don't recall it doing that when I made my departing radio calls. I plugged a second headset into the other front seat and got the same results when I pushed the other PTT. I put the second headset back into the original side and tried again with the same result, as to help ensure that the headset wasn't the problem. The first headset was a Bose X through a LEMO plug (which is wired to the adjacent two-plugs per Bose instructions), and the second was a David Clark through the usual two plugs. I'm away from my usual shop and tools, so I wonder if anyone might have any tips about where to focus my troubleshooting? Has anyone encountered this type of behavior before out of the 430 or another radio? This is a single-radio installation with a Flightcom 403 intercom. The left and right PTT keys are consolidated in the intercom, but with the behavior being the same on both sides, I'm doubtful that the problem would be there.


    Message 7


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    Time: 03:10:06 PM PST US
    From: Charlie England <ceengland7@gmail.com>
    Subject: Re: one-wire alternators- the subject that just
    won't die




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